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Commit f44333ea authored by Carter Schonwald's avatar Carter Schonwald Committed by Austin Seipp
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Changing prefetch primops to have a `seq`-like interface

Summary:
The current primops for prefetching do not properly work in pure code;
namely, the primops are not 'hoisted' into the correct call sites based
on when arguments are evaluated. Instead, they should use a `seq`-like
interface, which will cause it to be evaluated when the needed term is.

See #9353 for the full discussion.

Test Plan: updated tests for pure prefetch in T8256 to reflect the design changes in #9353

Reviewers: simonmar, hvr, ekmett, austin

Reviewed By: ekmett, austin

Subscribers: merijn, thomie, carter, simonmar

Differential Revision: https://phabricator.haskell.org/D350

GHC Trac Issues: #9353
parent 8afdf274
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